222 results about "Optical fiber coupling" patented technology

A neurosurgery system for probing brain tissue of a patient for tumorous tissue. The system including a suction tool, an excitation source, an optical instrument, and a controller. The suction tool including a suction cannula defining a lumen, an optical fiber configured to transmit fluorescence emitted by the brain tissue; and an indicator configured to selectively emit visible light. An excitation source is configured to emit an excitation light having a wavelength to induce the fluorescence in the tumorous tissue. The optical instrument is coupled to the optical fiber. The optical instrument configured to convert the fluorescence emitted by the brain tissue and transmitted by the optical and configured to determine that the brain tissue is tumorous based on the electrical signal and activate the indicator based on the determination.

The invention relates to the technical field of coupling alignment of single-mode optical fibers, in particular to an optical fiber coupling alignment method and system based on wavefront aberration and a sensitivity matrix. The system comprises an optical measurement module, a processing and control module and a multi-axis precision adjustment platform, and the alignment method comprises the steps that firstly, an interference fringe image is obtained and processed through an interference light path, continuous wavefront is recovered through Fourier transform and phase unwrapping, and a Zernike coefficient for quantizing wavefront distortion is obtained through Zernike polynomial fitting. A sensitivity matrix representing the linear relation between the degree-of-freedom adjustment amount and Zernike coefficient changes is established and serves as a physical guide item to introduce a speed updating formula of a particle swarm optimization algorithm, an SG-PSO algorithm is formed, a particle swarm is guided to conduct directional intelligent search and rapidly output the optimal adjustment amount, and finally a multi-axis precision adjustment platform is driven to complete alignment. According to the method, optimization of wavefront sensing and physical model guiding is effectively fused, and the convergence speed, the alignment precision and the global search capability are remarkably improved.

The invention discloses a fiber optic spectrometer for film thickness measurement. The fiber optic spectrometer comprises a control and data processing module, a detection module, a light source module and a light splitting module, the optical fiber coupling module couples wide-spectrum light of the light source module and then guides the light to the light splitting module; the light splitting module adopts a cross-type Czerny-Turner light path structure, and performs collimation, dispersion and focusing processing on light beams in sequence; the detection module is used for receiving the optical signal processed by the light splitting module and forming an interference pattern; and the control and data processing module is used for driving acquisition, completing pixel-wavelength calibration and calculating the film thickness based on an acquired interference pattern. According to the optical fiber spectrometer measurement method for film thickness measurement, the problem of low accuracy of real-time film thickness detection in the prior art is solved.

The utility model discloses silicon optical wafer test equipment. The silicon optical wafer test equipment comprises a camera assembly, a deflection optical path assembly, a probe station and an optical fiber coupling module, the driving assembly is used for driving the probe station and the deflection optical path assembly to move to the lower part of the camera assembly and the optical fiber end part of the optical fiber array in a mutual switching manner; the optical fiber coupling module is used for clamping the optical fiber end part of the optical fiber array; when the probe station moves to the position below the camera assembly, a cross cursor of a camera of the camera assembly is adjusted to be parallel to a cutting channel of the silicon optical wafer; when the deflection light path assembly moves into the imaging view field of the camera assembly, the camera assembly is used for collecting a first lateral image and a second lateral image through the deflection light path assembly and collecting a vertical image; and adjusting the end part of the optical fiber by using an optical fiber coupling module according to the image, so that the end part of the optical fiber and the optical waveguide are aligned and coupled. According to the application, the operation difficulty and the equipment structure for realizing alignment coupling between the optical fiber end part and the silicon optical waveguide are simplified, and the equipment cost is reduced.

A photonic system includes an optical coupling interface for an optical fiber disposed on a first surface of a support material and a PIC die / chip disposed on a second surface of the support material that is opposite from the first surface of the support material. The PIC die / chip includes an oxide stack, where a portion of the oxide stack is configured as an optical reflector structure that includes a reflecting surface configured to direct a light beam conveyed from an optical waveguide within the PIC die / chip from a first direction of travel to a second direction of travel directed toward the second surface of the support material and toward the optical coupling interface for the optical fiber disposed on the first surface of the support material. The light beam travels through the optical reflector structure and through the support material to reach the optical coupling interface for the optical fiber.

The invention relates to the technical field of spot-size converters, and discloses a lithium niobate film spot-size converter with an asymmetric trident structure and a preparation method of the lithium niobate film spot-size converter with the asymmetric trident structure. The lithium niobate film waveguide layer is positioned on the insulating layer; the silicon dioxide layer is coated on the lithium niobate film waveguide layer; the silicon nitride waveguide layer is located on the silicon dioxide layer; the silicon nitride waveguide layer comprises a first waveguide part, a second waveguide part and a third waveguide part which are connected in sequence in the direction from the input end to the output end of the lithium niobate film spot size converter, and the first waveguide part, the second waveguide part and the third waveguide part are located on the same plane; in the light wave transmission direction, the transverse size of the second waveguide part is sequentially increased, and the transverse size of the third waveguide part is sequentially reduced; according to the invention, the process preparation difficulty is low, high-efficiency coupling with the coupling efficiency of more than 90% from the silicon nitride waveguide to the lithium niobate waveguide can be realized, and the optical fiber coupling alignment tolerance and overlay tolerance as well as the overall coupling efficiency of the spot size converter are improved.

The invention provides a film lithium niobate chip optical fiber coupling machine vision alignment control method, which comprises the following steps: acquiring a high-resolution image of a waveguide end surface of a film lithium niobate chip, and extracting a multi-structure vision representation set from the high-resolution image; determining an effective action area of the mode field by combining the emergent light intensity distribution and geometric constraint provided by the boundary of the side wall; calculating an energy weighted center based on the light intensity distribution in the effective action area of the mode field, and mapping the energy weighted center to an assembly platform coordinate system to obtain an optical coupling reference center for alignment; with the optical coupling reference center as a target, the position and posture of the optical fiber are adjusted through feedback control, so that the center of an optical fiber core approaches and aligns to the optical coupling reference center; after alignment is completed, the stable optical fiber pose is evaluated and locked, the final coupling pose and performance indexes are output, the problem of decoupling of the visual reference and the real optical reference can be solved, and low-loss and high-stability coupling between the thin-film lithium niobate chip and the optical fiber is achieved.

The invention, which belongs to the technical field of spectral imaging, discloses an ultra-wide-band ultra-wide-field-of-view high-spectral-resolution real-time imaging spectrometer comprising a first micro-lens array, a plurality of optical fibers, a plurality of second micro-lens arrays and a plurality of assemblies. First micro lenses in each column of the first micro lens array are arranged on a vertical plane arc, and micro lenses in each row are arranged on a horizontal plane straight line, so that incident light of a one-dimensional ultra-wide view field is obtained in real time; through optical fiber coupling, incident light is transmitted to the second micro lens array to be collimated into parallel light beams; according to the components, light of different wavebands is processed through the optical filter, the plane transmission grating and the detector, first-order diffraction light beams of different wavelengths in the different wavebands are received by the detector after diffraction, and space information and spectral information are obtained in real time according to an irradiated target block. The imaging spectrometer provided by the invention has the advantages of ultra-wide wave band, ultra-wide field of view, high spectral resolution, real-time measurement, compact structure and high stability, and is suitable for a remote sensing photoelectric reconnaissance detection system.

The invention belongs to the technical field of optical modules, and particularly relates to a CPO module structure which comprises an installation shell, a switching chip, an optical engine, a light source system and an auxiliary monitoring system, the switching chip and the optical engine are installed on a supporting substrate in the installation shell, an optical fiber coupling interface is arranged on the outer side of the installation shell, and the optical fiber coupling interface is connected with the optical source system. The optical fiber link is used for connecting the optical engine and external computer equipment; according to the CPO module structure, related data such as power management, temperature management and link connection signal stable state of the CPO module structure in the use process are monitored in real time through the configured auxiliary monitoring module, and the data are collected through optical power, temperature, current sensors and the like; when abnormal data occur in the monitoring process, troubleshooting and positioning and automatic maintenance and troubleshooting can be rapidly carried out, the frequency of disassembly, maintenance and repair is reduced, and the use experience is improved.

The invention belongs to the technical field of light beam coupling tracking and pointing, and particularly relates to a light beam coupling tracking and pointing method and device based on an automatic adjusting optical fiber coupling module, and the method comprises the steps: obtaining a cooperative target light beam, carrying out the shaping processing of the cooperative target light beam through an optical system, and carrying out the symmetric light splitting of the shaped cooperative target light beam through a spectroscope; the light beam is divided into a detection light path and a coupling light path; the position of a light spot on a detection light path is detected through a CMOS module, the center coordinate of the light spot is extracted, and the X-axis offset difference value and the Y-axis offset difference value of the center coordinate and the preset center position of the CMOS module are calculated; and calculating the adjusting quantity of the XYZ three-axis micro-motion execution mechanism through a closed-loop algorithm, controlling the micro-motion execution mechanism to drive the optical fiber coupling module to move in the corresponding axial direction, continuously collecting light spot position data of the CMOS module, and adjusting the adjusting parameters of the micro-motion execution mechanism in real time through data feedback. Therefore, the problems of high delay, limited accuracy and the like in the prior art are solved.

The invention relates to the technical field of free space optical communication, in particular to an atmospheric turbulence adaptive optical compensation method for wireless laser communication, which comprises the following steps of: performing light beam coarse tracking by using a fast reflector to eliminate tilt drift; monitoring the received light intensity of the wavefront sensor in real time, and setting a threshold value for mode judgment; when a channel is good, a Kalman filtering algorithm is adopted to predict and compensate system delay, modal decoupling is carried out on reconstructed wavefront, a large-stroke deformable mirror is controlled to correct low-frequency large-amplitude aberration, and a micro-electro-mechanical deformable mirror is controlled to correct high-frequency residual error; and when the channel is in deep fading or the detector fails, the blind optimization mode is automatically switched, the state of the large-stroke deformable mirror is locked, and SPGD iterative control is applied to the micro-electro-mechanical deformable mirror based on the communication light intensity. According to the invention, through a double-deformable mirror frequency division cooperation and hybrid sensing strategy, the problems of insufficient bandwidth, limited stroke, easy interruption and the like of a traditional system under strong turbulence are effectively solved, and the optical fiber coupling efficiency and the robustness of a communication link are significantly improved.

The application discloses a disk medium high-energy ultra-short pulse laser regenerative amplifier based on CPA technology, comprising: a femtosecond laser seed light source for providing femtosecond seed light; a chirped Bragg fiber grating for expanding the femtosecond seed light into nanosecond laser pulses; an optical coupling input and output device for coupling input of the nanosecond laser pulses and coupling output of the nanosecond laser pulses after amplification processing; a regenerative amplification laser cavity for regenerative amplification processing of the coupled-in nanosecond laser pulses; the optical coupling input and output device comprises a fiber coupling collimation module, an optical isolator, a first 1 / 2 wave plate and a thin film polarizer; the regenerative amplification laser cavity comprises a Pockels cell, a second 1 / 2 wave plate, a first reflection module, a second reflection module, a first telescope module, a second telescope module, a first disk gain medium, a second disk gain medium and a third reflection module; the regenerative amplifier can realize high-repetition-frequency and high-pulse-energy laser pulse output.

The invention relates to a three-way structure for hollow-core optical fiber coupling and fluid injection and an optical fiber unit for detection, belongs to the technical field of gas detection and ultrafast optical lasers, solves the technical problems that a phosgene coupling gas chamber is large in size and low in flexibility, and comprises a three-way main body and a ceramic sleeve. The three-way body is provided with three interfaces, the inflation channel interface is provided with an air chamber, an optical fiber coupling channel is arranged between the FC / APC optical fiber interface and the FC / PC optical fiber interface, the air chamber is communicated with the optical fiber coupling channel through the air chamber channel, the ceramic sleeve is located in the optical fiber coupling channel, and the first ceramic sleeve clamping groove and the second ceramic sleeve clamping groove are used for fixing the ceramic sleeve. The optical fiber unit for detection comprises a three-way structure, an FC / APC hollow optical fiber, an FC / PC hollow optical fiber and a plug. The invention discloses a liquid Raman detection system. A laser comprises an optical fiber unit for detection. The gas sensor is used for gas detection in the fields of environmental gas and medical and chemical engineering.

The invention belongs to the field of optical measurement and detection, and particularly relates to a coherence tomography wavefront measurement device and method based on optical fiber interconnection and point diffraction, the measurement device separates a fundamental mode and a high-order mode of test light through a few-mode optical fiber, the fundamental mode generates a reference spherical wave through point diffraction to serve as reference light, and the high-order mode serves as the test light; after the test light and the reference light are subjected to optical fiber coupling interference, an interference pattern is obtained by a detector, and wavefront error measurement and optimization are realized through wavefront calculation and correction. The method has high precision and high stability, and can realize rapid closed-loop feedback correction.

The invention provides a space laser communication fine tracking assembly, which adopts a two-stage closed-loop control system to realize high-precision tracking, the first stage adopts a light spot centroid tracking technology and adjusts a light beam direction in real time through elements such as an FSM fast reflector and a CMOS camera to compensate miss distance, and the second stage adopts an optical fiber nutation coherent tracking technology to compensate miss distance. According to the system, the micro-electromechanical system (MEMS) mirror, the nutation device, photoelectric detection and the like are combined, the tracking precision is further improved through optical fiber coupling and frequency mixing processing, the FPGA programmable processor serves as a core to process images and signals and generate control signals to drive the reflector and the nutation device, accurate alignment of receiving and transmitting optical axes is ensured, and efficient and stable space laser communication is achieved. According to the invention, through combination of the first-stage light spot positioning tracking technology and the second-stage space nutation coherent tracking technology, precise control and tracking of the light spot position in space laser communication are realized, and the suppression bandwidth and precision of precise tracking are effectively improved.

A spectroscopy system comprising: an illumination apparatus configured to direct light towards an object; a light collection apparatus configured to receive light from the object; and a detection apparatus. The light collection apparatus comprises a first fibre and a plurality of second fibres, wherein the first fibre has a larger cross-sectional area than each second fibre. The first fibre is configured to be coupled to the object to receive the light therefrom. The plurality of second fibres are arranged to couple the first fibre to the detection apparatus.

The invention discloses a light source module and a projection display device. The light source module comprises a laser light source; the coupling lens is arranged on an emergent light path of the laser light source, and the light incident side and / or the light emergent side of the coupling lens are / is provided with an aperture diaphragm; and the tail fiber is arranged on an emergent light path of the coupling lens, light emitted by the laser light source is coupled into the tail fiber through the coupling lens, and by setting the type of the tail fiber and designing an optical fiber coupling end face, echoes and stray light generated at the optical fiber coupling end face are reduced, the influence of the echoes and the stray light on output of the laser is weakened and avoided, and the imaging quality is improved.

This optical fiber holding member is provided with: a first surface and a second surface arranged side by side in a first direction; and a plurality of through holes penetrating between the first surface and the second surface in the first direction. Each of the plurality of optical fibers includes: an insertion portion inserted and held in each of the plurality of through holes; and a protruding part which protrudes from the through hole to the outside and is inserted into each of the plurality of ferrule holes. The minimum value of the inner diameter of the through hole is greater than or equal to the maximum value of the outer diameter of the insertion part. When the central axis of the ferrule hole coincides with the central axis of the through hole when viewed in the first direction, and the central axis of the insertion portion is inclined to the maximum extent with respect to the central axis of the through hole inside the through hole, the tip of the protruding portion is located further inward than the inner surface of the ferrule hole when viewed in the first direction.

The invention relates to the technical field of sensing, and discloses a demodulator chip with a phase noise compensation function and an optical fiber sound wave sensing system, and the demodulator chip comprises an optical port module, a first polarization filter, a beam splitter module, a modulator, a coherent receiving module and a phase noise extraction module. The optical port module is used for acquiring an incident laser signal, outputting probe light, acquiring scattered light and coupling with the delay optical fiber; the first polarization filter is connected with the optical port module; the beam splitter module is connected with the first polarization filter; the beam splitter module is connected with the optical port module through the modulator; the coherent receiving module is connected with the beam splitter module; the coherent receiving module is connected with the optical port module; the beam splitter module is connected with the phase noise extraction module, and the phase noise extraction module is connected to the delay optical fiber; the phase noise extraction module is used for extracting phase noise through a delay self-coherence mode; the requirement for the laser line width can be lowered, and the sensing performance under the same laser line width level is improved.

An optical apparatus includes: a base; a light emitting element arranged on the base and configured to output laser light; a plurality of optical components arranged on the base and configured to guide the laser light output from the light emitting element to an optical fiber, and couple the laser light with the optical fiber; and a shielding unit arranged on the base and configured to block stray light deviated from a predetermined optical path in a first optical component as the optical component and traveling to a second optical component as the optical component, and reflect the stray light in a direction deviating from the first optical component.

This invention belongs to the field of fiber optic sensing and relates to a method based on WS 2 A temperature sensor based on all-fiber fluorescence intensity comprises a single-mode fiber, a three-hole grapefruit fiber, and a multimode fiber connected in sequence; the three-hole grapefruit fiber has three air holes, in which WS is deposited. 2 The multimode fiber output end is equipped with a mounting base, on which a filter is mounted. This invention utilizes WS... 2 Assembled within a three-hole optical fiber, with single-mode and multi-mode fibers fused together at both ends, this sealed structure effectively isolates the sensor from external air, preventing contact between the outside air and the two-dimensional material on the inner wall of the fiber during heating. This slows down the decomposition of transition metal sulfides, significantly improving the fluorescent sensor's ability to detect high temperatures and extending its lifespan. The sensor itself and its detection system are coupled and output via optical fiber, eliminating the need for external spatial light or optical modulation.

This invention provides a wind erosion monitoring system and method based on distributed optical fiber, belonging to the field of optical-based wind and sand monitoring technology. It includes: constructing a wind erosion monitoring system comprising a linearly tunable laser, an optical isolator, a first coupler, an upper branch, a lower branch, a sand particle capture sensor, a photoelectric detection and acquisition module, and a host computer; utilizing the Rayleigh scattering signal of the linearly swept laser in the sensing optical fiber and the interference with a reference light, the vibration information distributed along the optical fiber is obtained by demodulating the beat frequency signal; combining the constructed sand particle impact and optical fiber coupling model, the dynamic strain generated by sand particle impact is converted into phase changes, realizing the acquisition of sand particle impact location, sand particle size, and sand particle quantity. This invention enables continuous distributed monitoring of wind and sand flows with high spatial resolution, and has advantages such as resistance to electromagnetic interference, strong environmental adaptability, and multi-parameter sensing, and can operate stably for a long time in harsh desert environments.

A semiconductor photonics device may include a photonic integrated circuit and may be coupled with an output optical fiber at a top surface of the semiconductor photonics device. To facilitate coupling of modulated optical signals to the output optical fiber at the top surface of the semiconductor photonics device, the semiconductor photonics device may include a mirror structure that is supported by a semiconductor support structure included in the semiconductor photonics device. The mirror structure may be positioned at an angle relative to a surface of a semiconductor substrate of the semiconductor photonics device, which enables the mirror structure to transfer a modulated optical signal propagating in a first direction to a second direction toward the output optical fiber.

An optical chip structure is adapted for coupling an optical fiber array. The optical fiber array includes optical fibers arranged side by side. The optical chip structure includes an optical fiber coupling substrate, optical fiber accommodation grooves, and stoppers. The optical fiber accommodating grooves are adapted to accommodate the optical fiber array. The optical fiber accommodating grooves extend along a first axis and are arranged side by side in the optical fiber coupling substrate along a second axis. The first axis is perpendicular to the second axis. The optical fiber accommodating grooves respectively include first ends and second ends opposite to each other. The first ends are located at an edge of the optical chip structure. The stoppers are located in the optical fiber coupling substrate and are respectively located at the second ends. When the optical fiber array is accommodated in the fiber accommodation grooves, the optical fibers are respectively abutted against the stoppers to position in the first axis.

A photonic system includes an optical coupling interface for an optical fiber disposed on a first surface of a support material and a PIC die / chip disposed on a second surface of the support material that is opposite from the first surface of the support material. An optical reflector structure is disposed within the PIC die / chip. The optical reflector structure is configured to receive a light beam from an optical waveguide within the PIC die / chip and turn the light beam toward the second surface of the support material and toward the optical coupling interface for the optical fiber. The light beam travels in a first direction from the optical waveguide within the PIC die / chip through the optical reflector structure, and then in a second direction through the optical reflector structure, and then through the overall thickness of the support material to reach the optical coupling interface for the optical fiber.

The application provides a multi-core optical fiber coupling connection method, taking a multi-core optical fiber, using an HF acid corrosion solution to gradually corrode each multi-core optical fiber core from the end face of the multi-core optical fiber to form a plurality of multi-core optical fiber core corrosion holes; taking a single-mode optical fiber, using the HF acid corrosion solution to corrode the cladding of the single-mode optical fiber from the outside to the inside to the outer wall of the single-mode optical fiber core to form a plurality of single-mode optical fiber bare cores; inserting each single-mode optical fiber bare core into each multi-core optical fiber core corrosion hole, and making the end face of the single-mode optical fiber bare core abut against the end face of the multi-core optical fiber core at the bottom end of the multi-core optical fiber core corrosion hole; filling a solidified glue into the multi-core optical fiber core corrosion hole, and waiting for the solidified glue to completely solidify, thereby solving the problem of coupling connection of the split single-mode optical fiber core and the multi-core optical fiber.

The embodiment of the present application discloses an XY coupling table, which comprises a bottom plate, a top plate, an X-axis driving mechanism and a Y-axis driving mechanism, the X-axis driving mechanism comprises an XY-axis guide rail assembly, an X-axis mover and an X-axis coil, the Y-axis driving mechanism comprises a YX-axis guide rail assembly, a Y-axis mover and a Y-axis coil, the XY-axis guide rail assembly comprises a first X-axis guide rail assembly and a first Y-axis guide rail assembly, the X-axis mover of the X-axis driving mechanism is connected with the first X-axis guide rail assembly; the YX-axis guide rail assembly comprises a second Y-axis guide rail assembly and a second X-axis guide rail assembly, the Y-axis mover of the Y-axis driving mechanism is connected with the second Y-axis guide rail assembly; and the top plate is connected with the first Y-axis guide rail assembly and the second X-axis guide rail assembly. The present application can significantly reduce the assembly height and the overall volume of the coupling table, remove the drag chain cable, reduce the motion friction and external interference, and greatly improve the alignment accuracy and the fiber coupling efficiency of the coupling table.

The invention, which relates to the technical field of the fiber laser, discloses a near-fundamental-mode myriawatt-level fiber laser of a semiconductor direct pump, comprising a single-mode seed source, an inclined grating group, a mode field adapter, a mode purification device, an amplification stage structure and an output optical cable. The single-mode seed source is sequentially connected with the inclined grating group, the mode field adapter and the mode purification device; the amplification stage structure comprises a pumping source group, and a backward coupler, an active optical fiber, a first cladding light stripper and a second cladding light stripper which are connected in sequence; the output end of the mode purification device is connected with the first cladding light stripper; the output ends of the plurality of semiconductor lasers are coupled with the active optical fiber through the backward coupler; the second cladding light stripper is connected with the output optical cable; the semiconductor laser directly serves as the pumping source, an additional light path is not needed, the structure is more compact, the maturity is high, the mass production cost is low, and the overall cost is greatly reduced.

The application discloses an output light power proportion adjustable fiber coupling system for atomic physics research, comprising a first fiber collimator, and further comprising a second fiber collimator, a first reflector, a second reflector, a liquid crystal variable retarder, a polarization beam splitter prism, a first half-wave plate and a second half-wave plate; the application can work in two modes of proportion adjustable beam splitting and beam combining according to specific requirements; the proportion of laser entering the first fiber collimator and the second fiber collimator can be quickly adjusted; the utilization efficiency of laser in a set of experimental system and the stability of the experimental system are improved; the space occupied by the experimental system is reduced, and a large amount of experimental resources is saved.

A package includes: a package substrate; a first integrated device coupled to the package substrate through a first plurality of solder interconnects; an encapsulation layer at least partially encapsulating the first integrated device; a plurality of pillar interconnects at least partially located in the encapsulation layer; a metallization portion coupled to the plurality of pillar interconnects; a second integrated device coupled to the metallization portion through a second plurality of solder interconnects; an optical integrated device coupled to the package substrate; and an optical fiber coupled to the optical integrated device.